Now there's a good question. There was... an explosion. That's what we're told, I'm a bit foggy on the details, I doubt if anyone can really be sure of them. But they say things used to run quite smoothly, but something erupted, and shattered one reality into hundreds of thousands of them. Now they're constantly shifting and unbalancing each other, as so many can't be sustained altogether without some mishap. It's all quite cosmic, and a bit overwhelming to look at it like that. I prefer to focus on solving the trouble of just one reality at a time.